class Lady {
    content = 'Hi ,帅哥'

    sayHello() {
        return this.content
    }
}

class XiaoJieJie extends Lady {
    sayHello() {
        return super.sayHello() + '. 你好!'
    }
    sayLove() {
        return 'I love you'
    }
}

const goddess = new XiaoJieJie();

console.log(goddess.sayHello())
console.log(goddess.sayLove())
